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ROPE .CHECK 0R LOCK. NoI 349,031. Patented Sept. 14, 188.6.

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UNITED STATES PATENT OEETCE.

GEORGE IV. COOK, OF CHICAGO, ILLINOIS, ASSIGNOR TO MERRICK CUMMINGS, OFSAME PLACE.

ROPE CHECKYOR LOCK.

SPECIFICATION formingpart of Letters Patent; No. 349,031, datedSeptember 14,1886.

Application filed August 19, 1385. Serial No. 174,843. (Model.)

To all whom, it may concern:

Be it known that I, GEORGE W. COOK, of Chicago, in the county of Cookand State of Illinois, haveinvented certain new and useful Improvementsin Rope Checks or Locks, of which the following is a specification.

The object of my invention will be more fully understood by reference tothe accompanying drawings,which form part of this specification, and inwhich similar letters of reference indicate like parts. y

In said drawings, Figure l is a plan view of a device embodying myinvention; Fig. 2, a side view thereof. Fig. 3 is a central hori- Zontalsection ofthe same, and Fig. 4 is a perspective detail of one of theparts.

In said drawings, the letter A represents the frame, which is to besecured, by bolts or otherwise, to the window sash or door. It isprovided at either side with upright flanges a. The front piece, B,rests in these flanges, and is provided with lugs or projections b, tofit in the notch in the top of said iianges c, as shown in Fig. 2. Theplate B is secured, by the rivet b or otherwise, to the frame A, andwhen so secured affords room betweensaid plate and said framecorresponding to the height of the flange a. I provide two latches,C,which I hold in place by the same rivet which secures the plate B tothe frame A. These latches C are provided each with a corrugatedcam-lug, c, and are made so as to overlap each other, and so as topermit the cani-lug portion to be fully as high as the ange a..

Between the Lwo inner surfaces of thelatches C C, I make annular groovesc, one in each latch, to receive a coil-spring, D. The ends of thisspring project outwardly 'from each other, and press against the twocontiguous faces of the cam-lug, thus tending to force said lugs apart,as illustrated in Eig. 3. Ris? ing vertically from said lugs are thethumbpieces c. The front piece, B, is provided with aslot or opening,through which the thumblatches c pass. An additional rivet or pin isplaced as shown at E, for the purpose hereinafter mentioned, and also toaid in securing the parts together.

In operating my invention the cord or rope is inserted at either side ofthe pin E, passed down between the .flange a and the corrugated cam-lugc, against the pressure of the spring D. Power applied to the rope inthe opposite direction forces the corrugated portions of the lug intothe rope and presses the rope against the flange a, thus securelylocking it. When two ropes are used, as in Eig. I, it sometimes happensthat the ropes become twisted and entangled and seek to enter thelocking device in that condition. rIhe pin E is used for the purpose ofseparating the ropes, thus allowing the perfect working of the lock.

Vhat I desire to claim and secure by Letl` ters Patent isl. In a ropecheck or lock, the combination of the frame A, provided with verticalilanges a c on either side, the cap B, resting on said flanges a c, theoverlapping cam-latches C C,

placed between said frame A and cap B, and

having in each a groove or recess, c2', the bolt or rivet b, securingsaid frame, cap, and latches together, and the spring D, placed in saidgroove c2 around said rivet b', having its ends project against saidlatches to force them in opposite directions against said flanges a a,substantially as speciiied.

2. In a rope catch or lock, the combination of the frame A, cap B, andlatches C C, all secured bythe saine bolt or rivet, b",with the springD, said latches being each provided with a corrugated cani-edge, thethickness whereof shall correspond with the space between the face ofthe frame A and the under face of the cap B,while the remaining portionshall be about one-half that thickness, so that the latches overlap eachother, each latch being also provided with a vertically-projectingthumb-piece, c', extending through proper openings in the cap B, wherebya rope or cord ot' as large diameter as the thickness of the corrugatedportion of the latch C may be used, all operating substantially as shownand described.

GEORGE NV. COOK.

Vitnesses:

TAYLOR E. BROWN, M. CUMMINGs.

